how many sounds are there aprox. in the 16mb library and how many are there when maxed out to 32mb.

The QS series has 640 separate 'programs', each made up of between one to four samples or sounds, distributed in five banks (128/bank). There are 500 mixes of these programs in five banks (100/bank). Each mix can have between one and sixteen programs. Each 'Q-card' contains 8megs of samples, 128 programs, 100 mixes. All of the QSR, QS6.1, QS7, QS8 have two Q-card slots. So if you want to count only programs then you have 640 + 128 + 128. Now with each Q-card comes a floppy disk that has 256 more programs and 200 more mixes to download into the user banks. You can add a 512sram card @$60 to add another 8 banks of user programs and 8 banks of user mixes. I think at one time I had as many as 2900 different sounds in my QS8. Hope this helps.